0 Share Newsweek is a Trust Project member See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Wladimir Klitschko has paid tribute to ex-fiancée Hayden Panettiere following her sudden death on Sunday, saying his family is in "profound shock and grief."
"She left this world far too soon. Hayden was, although no longer my partner, an important part of my life and the mother of our daughter, Kaya," the former professional boxer wrote on Instagram.
"She built an incredible career through immense talent, while also facing the darker sides of a very demanding industry. Nothing will erase the times we shared or the place she had in our lives," he continued.
Klitschko added, "To our daughter Kaya, I will always speak of her mother with respect and make sure she remembers the person she was."
Panettiere, 36, died on Sunday in Greenville, South Carolina. Police said officers and emergency medical services responded to a report of an unresponsive woman around 1:50 p.m., and that Panettiere was pronounced dead at the scene.
On Monday, the Greenville County Coroner's Office provided Newsweek with its initial report , confirming that a 911 call came in at 1:51 p.m. for a cardiac arrest at 701 Easley Bridge Road.
According to the coroner, EMS initiated advanced cardiac life support, but resuscitation efforts were unsuccessful and Panettiere was pronounced dead at 2:32 p.m.
An autopsy conducted on Monday found no signs of trauma that would have contributed to her death.
Dispatch audio referenced cardiac arrest and a suspected overdose, though authorities have not released an official cause.
TMZ reported that Panettiere had been staying at the unit with her on-again, off-again boyfriend Brian Hickerson , who was living there with his brother, Zachary Hickerson, and that the pair flew from Los Angeles to South Carolina the day before her death.
Born in Palisades, New York, Panettiere began appearing in commercials before her first birthday and later joined the daytime soap operas One Life to Live and Guiding Light .
Her early film work included voicing Dot in Pixar's A Bug's Life and playing Sheryl Yoast in the 2000 football drama Remember the Titans . She went on to appear in Raising Helen , Racing Stripes , Ice Princess and Bring It On: All or Nothing . Her work on the Bug's Life read-along album also earned her a Grammy nomination for best spoken-word album for children.
Panettiere's breakthrough came in 2006 when she was cast as Claire Bennet, a high school cheerleader with regenerative powers, in NBC's superhero drama Heroes —which ran for four seasons.
She later starred opposite Connie Britton as country singer Juliette Barnes in Nashville , which aired from 2012 to 2018. The role, which allowed Panettiere to combine acting with singing, earned her two Golden Globe nominations for supporting actress.
Her other notable work included playing horror fan favorite Kirby Reed in Scream 4 , a role she reprised more than a decade later in Scream VI . She also provided the voice and likeness of Sam Giddings in the video game Until Dawn .
Panettiere's final film, which premiered in January, was the psychological thriller Sleepwalker , in which she starred as a grieving mother and served as an executive producer.
Contact Newsweek editors on this story: John Fitzpatrick and Shakeema Edwards .